ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,751,590, issued on Oct. 6, was assigned to PIXART IMAGING INC. (Hsin-Chu, Taiwan).

"Cleaning system and cleaning method" was invented by Shih-Feng Chen (Hsin-Chu, Taiwan), Han-Lin Chiang (Hsin-Chu, Taiwan) and Ning Shyu (Hsin-Chu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cleaning system and a cleaning method are provided. The cleaning system includes a main body, an air suctioning device, a light source, an optical sensor, a memory and a processing unit. The air suctioning device includes an air flow passage and a fan-motor assembly that is disposed in the air flow passage and generates a suction force to suction outside air through the ai...